key term - F-block elements

Definition

F-block elements are a set of elements found in the periodic table's f-block, which includes the lanthanides and actinides. These elements have electrons filling their f-orbitals and exhibit unique properties related to their electron configurations.

5 Must Know Facts For Your Next Test

1. F-block elements consist of two series: lanthanides (atomic numbers 57-71) and actinides (atomic numbers 89-103).
2. Lanthanides are known for their rare earth properties and are widely used in industries such as electronics, magnets, and lasers.
3. Actinides include both naturally occurring elements like uranium and thorium, as well as synthetic elements like plutonium.
4. Most f-block elements exhibit multiple oxidation states, which contribute to their complex chemistry.
5. These elements often form colored compounds due to electronic transitions within the f-orbitals.

Review Questions

Related terms

Lanthanides:

A series of fifteen metallic chemical elements with atomic numbers from 57 to 71, known for their magnetic and phosphorescent properties.

Actinides:

A series of fifteen radioactive metallic elements with atomic numbers from 89 to 103, including both naturally occurring and synthetic elements.

Oxidation State:

The condition of an atom expressed by the number of electrons that the atom needs to reach its elemental form.